20x25x4 MERV 11 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke

Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke Simple to install and a cost-effective step towards a healthier home environment. Replace 3"-5" filters every 3-6 months. 100% synthetic electrostatic media for high efficiency with low air flow resistance